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+--- Thread: Transcoding with HDR Question (/t-transcoding-with-hdr-question)
Transcoding with HDR Question - en6ads - 2025-05-12
Hi,
Can Jellyfin transcode a source with HDR (either static or dynamic metadata) to an output also with HDR? Put another way, does HDR survive the transcode and get included in the output? If so, is the outputted HDR static or dynamic? If input is dynamic (HDR10+ or DV), Will the output also be dynamic?
I've tried 3 different clients (Android with a HDR display, iOS iPad with HDR display, windows 11 Jellyfin Media Player output to a HDR display), and all the results look SDR to me. When transcoding, I'm going from a source of 60 - 100mbps to an output of 28mbps (cellular). I use an Intel A310 with quick sync enabled, with tone mapping disabled (I don't want the server to tone map, I want the client display to do that), with AV1 and HEVC hardware enabled.
Many thanks.
RE: Transcoding with HDR Question - nyanmisaka - 2025-05-13
Currently all transcoding targets SDR. If using direct-playback or direct-streaming, HDR is preserved. Note that hardware encoders (for example QSV) also generally do not support carrying dynamic HDR metadata (HDR10+/DoVi), usually only static HDR10/HLG.
Currently our Jellyfin-FFmpeg part for HDR10/HDR10+/HLG/DoVi to HDR10 transcoding is in place. After completing the transcoder refactor, Jellyfin will allow users to choose to transcode from HDR to HDR (with reduced resolution/bitrate).
RE: Transcoding with HDR Question - en6ads - 2025-05-13
(2025-05-13, 12:23 AM)nyanmisaka Wrote: Currently our Jellyfin-FFmpeg part for HDR10/HDR10+/HLG/DoVi to HDR10 transcoding is in place. After completing the transcoder refactor, Jellyfin will allow users to choose to transcode from HDR to HDR (with reduced resolution/bitrate).
Thank you. Exciting news on the refactor work. Is the target release for this v10.11 or later to 10.12 or so?
Many thanks.
RE: Transcoding with HDR Question - nyanmisaka - 2025-05-13
It's on the roadmap but has no ETA, as the people here are volunteers doing free work in their spare time.
But it's definitely not in 10.11, as it's a big enough database refactor.